The usual age of onset is between 40 and 50. Interestingly, dry eye may a trigger in BEB. Dry eye also appears to be common in postmenopausal women, which is a common age for the onset of BEB. In a recent survey, approximately 40% of patients stated that their occupation was doing some sort of clerical work. It may be that the eye strain associated with clerical work can cause an abnormal blink reflex, initiating blepharospasms. Approximately 30% of patients report a positive family history.
There are approximately 267 breeds of horses and ponies in the world. Horses are bred with different purposes in mind. Some are bred for pulling carts, working on a farm, po â¦ ny clubs, showing, racing, etc.
Native American Horse Breeds. The descendants of Indian horses are still with us, including some of the most popular breeds in America today. American Quarter Horse. This breed descends from an 18th-century cross of Chickasaw ponies, with their superior speed and agility, and English thoroughbreds.